Yenna, Redtooth Regent, Ajani's Chosen, and Ashnod's Altar

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Ajani's Chosen on the battlefield
• Ashnod's Altar on the battlefield
• You have at least one Aura on the battlefield attached to a creature you control
• Yenna does not have summoning sickness
• available

Steps

1. Activate Yenna by paying and tapping it, creating a token copy of any Aura you control attached to any creature you control, then causing you to untap Yenna and scry 2
2. Ajani's Chosen triggers, creating a 2/2 Cat creature token, then attaching the Aura token to the Cat
3. Activate Ashnod's Altar by sacrificing the Cat, adding
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite scry 2